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Masuhara, N.
Ohio State Univ., Columbus (USA)1985
Ohio State Univ., Columbus (USA)1985
AbstractAbstract
[en] This dissertation describes measurements of collisionless spin waves in liquid 3He in the normal and superfluid A1, A, and B phases. The spin waves were measured by transverse cw NMR at the Larmor frequencies of 1,2, and 4 MHz. The pressure range was varied from 0 to12 bar. In the normal phase sharp peaks due to spin waves appear on the NMR line shape below 5 mK. These measurements were performed at several different field gradients. The experiment agrees quite well with a theory by Leggett (1970) and permits a determination of the Fermi liquid parameter F1/sup a/. Although spin waves were observed in the A1 phase, thus far there is no theory for their frequency and damping in this phase. In the A phase the spin waves were heavily damped except near T/sub c/. The peak frequency displays shifts which are not predicted by present theories. In the B phase the experiments agree at least qualitatively with the theory by Combescot (1975). The imaginary part of the diffusion coefficient in the B phase was determined from the experimental spin wave frequencies
Source
1985; 135 p; University Microfilms Order No. 85-10,601; Thesis (Ph. D.).
Record Type
Report
Literature Type
Thesis/Dissertation; Numerical Data
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AbstractAbstract
[en] Accurate solutions of the Ginzburg-Landau equations describing the A-B phase boundary for a planar interface between 3He-A and 3He-B are calculated near the tricritical pressure and classified in terms of simple discrete symmetries. The order-parameter components of the A-B phase boundary and the interfacial energy σ/sub AB/(T) deviate considerably from previous variational calculations
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Journal Article
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AbstractAbstract
[en] Superfluid liquid 3He is a unique system within condensed matter physics because it shows very sophisticated phenomena which are at the same time quite manageable theoretically. (orig.)
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Journal Article
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AbstractAbstract
[en] Two major open problems in the behavior of superfluid He: the question of nucleation of the B-phase, and the dynamics of the 3He A-B interface, are examined. (H.W.). 80 refs.; 5 figs
Source
Halperin, W.P. (Northwestern Univ., Evanston, IL (USA). Dept. of Physics and Astronomy); Pitaevskii, L.P. (AN SSSR, Moscow (USSR). Inst. Fizicheskikh Problem) (eds.); Modern Problems in Condensed Matter Sciences; v. 26; 994 p; ISBN 0 444 87476 3;
; 1990; p. 523-607; North Holland; Amsterdam (Netherlands)

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Book
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AbstractAbstract
[en] Experiments to see flow of superfluid Helium 3 are reported
Source
Quantum fluids and solids; Gainesville, FL (USA); 24-28 Apr 1989; CONF-8904257--
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Journal Article
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Conference
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AbstractAbstract
[en] The sequence of events that led to the discovery of fluidity of 3He is outlined and the theory developed to account for this phenomenon is described. (Z.J.)
Original Title
Zvlastni faze kapalneho 3He
Source
Translation of the lecture presented on the occasion of the Nobel Prize for Physics awarding ceremony. 19 figs., 108 refs.
Record Type
Journal Article
Literature Type
Translation
Journal
Ceskoslovensky Casopis pro Fyziku; ISSN 0009-0700;
; v. 47(6); p. 333-358

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AbstractAbstract
[en] The consequences of applying a BCS-like theory to the new A and B phases of superfluid 3He are discussed
Source
Kuper, C.G. (ed.); p. 151-161; 1975; John Wiley and Sons, Inc; New York; European topical conference on liquid and solid helium; Haifa, Israel; 1 Jul 1974
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Book
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Conference
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AbstractAbstract
[en] Research on 3He at very low temperatures is a vigorous and expanding field. Two years ago, two new phases of 3He were discovered at very low temperatures (about 0.002 degree above absolute zero). These phases have become known as anisotropic superfluids. A description is given here of some of the experimental evidence for the new phases and a simplified form of the theoretical model is presented. (9 figures, 25 references) (U.S.)
Original Title
Spin properties; equations of motion
Primary Subject
Source
16 Jun 1975; 21 p
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Report
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AbstractAbstract
[en] The nonlinear reversible hydrodynamic equations for the superfluid phases of 3He, i.e., 3He-A, 3He-A1, 3He-B, 3He-A in high magnetic fields, and 3He-B in high magnetic fields, are derived. The Mermin-Ho--type relations for 3He-A in high magnetic fields and 3He-B in high magnetic fields are given for the first time. The influence of higher-order gradient terms in all phases is discussed, and a new class of nonlinear terms containing the various kinds of velocities is given which have not been considered so far for any of the five superfluid phases. In addition we show that the hydrodynamic equations for 3He-A in high magnetic fields contain as a special case the hydrodynamics of superfluid 3He-A1 and the orbit part of the hydrodynamic equations for 3He without external field. Furthermore, we point out some structural similarities in the equations for 3He-A in high magnetic fields and 3He-B in high magnetic fields. As an additional effect we find that the higher-order gradient terms imply a preferred direction in the hydrodynamic equations for superfluid 3He-B
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Record Type
Journal Article
Journal
Physical Review. B, Condensed Matter; ISSN 0163-1829;
; v. 24(11); p. 6430-6439

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Boyd, S.T.
California Univ., Los Angeles, CA (United States)1992
California Univ., Los Angeles, CA (United States)1992
AbstractAbstract
[en] The author reports observations of the first-order phase transition between the two superfluid phases of 3He. A long cylindrical sample of the higher-temperature A phase is supercooled in a magnetic field within a simple dc magnetometer. B phase is then introduced at one end of the sample and its growth into the supercooled A phase is observed via the magnetometer signal. For temperatures above a certain value, Tnom, the phase interface travels up the tube at a fairly constant velocity, in reasonable agreement with the theory of Leggett and Yip. For temperatures below Tnom there arises a new interaction between the rapidly moving phase interface and the magnetization of the sample. These observations allow some characterization of this new interaction
Source
1992; 234 p; Univ. of California; Los Angeles, CA (United States); Available from University Microfilms, P.O. Box 1764, Ann Arbor, MI 48106 (United States). Order No. 93-01,523; Thesis (Ph.D.).
Record Type
Miscellaneous
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Thesis/Dissertation
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